Weft stop-motion for looms.



'E. STAHL.

'WBFT STOP MOTION FOR LooMs.

APPLICATION FILED-811F116, 1913.

Patented July 7, 19114.

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ATTORNEY THE NORRIS PETERS CO.. PHUTO-LITHQ. WASHINGTON. D C.

EMIL ST'AI-IL, OF EAST STROUDSBURG, PENNSYLVANIA.

WEFT STOP-MOTION FOR LOOMS.

Specification of Letters Patent.

Patented July 7, 1914.

Application filed September 16, 1913. Serial Ila-790,005.

To all whom it may concern Be it known that I, EMIL STAHL, a subject of Germany, residing at East Stroudsburg, in the county of Monroe and State of Pennsylvania, have invented certain new and useful Improvements in Weft Stop- Motions for Looms, of which the following is a specification.

This invention relates to looms and particularly to weft stop motions for looms. In these mechanisms the so-called dagger and the element against which it impingesto throw off the power are so related and constructed that injury to one or the other usually the daggerfrequently occurs, while occasionally the dagger fails to coact with said element in such a way as to produce the stopping of the loom. The object of this invention is, therefore, to provide a weft stop motion wherein these disadvantages will be avoided.

In the accompanying drawing, Figure 1 is a side elevation, partly in section, of a loom provided with the improved mechanism; and, Fig. 2 is a perspective view of the principal parts thereof.

In the loom frame a is arranged a beltshifting or other power controlling mechanism of anysuitable type, that sho-wn-including the hand-lever 6 carried on the shaft 0 arranged to rock in the frame, the lever d fulcrumed in the frame and having one end suitably connected with lever b and the other end with the connecting rod 6 nor mally drawn in the direction of the arrow by the spring fbeing one well known and in common use; the shaft 0 carries as usual the crank 9 whereby to apply the power for rocking the shaft and so destroying an interlock which, in the set position of the hand-lever, exists between said hand-lever and lever (Z and against the tension of the spring f maintains the belt on the driving pulley of the loom.

In the bracket 71, attached to the batten B are fulcrumed the dagger j and weft-fork is connected by the link Z, these parts being alternately moved to clear the weft-fork from the shuttles path and allow it to be depressed, as the batten assumes the backward position and moves forward, respectively, under the influence of the usual governing rod m which is suitably guided in the batten structure and so supported in the loom frame as to rock with the batten, all in a well-known manner.

a is the usual rock-shaft j ournaled in suitable brackets 0 in the breast-beam A and carrying a cam 39 which, when the rockshaft is turned, impinges against the crank g and so rocks shaft 0 to disestablish the interlock between levers?) and (Z ano'thus bring about the shifting of the belt from the driving to the idle pulley.

Referring, now, to the novel features shown in the drawing as golng to make up my invention, penetrated by and revoluble on therock-shaft n is a lever 9 having an iupwardly projecting arm 9 and a downwardly projecting arm 9 that forms with the rear curved face 9 of the lever a transverse cross-sectional V-shaped notch 9 Attached to the lever eccentrically thereof is one end of a spring 1" that is coiled about the rock-shaft, the lever and spring being confined between two adjustable collars s and t fixed on said rock-shaft, and one end of the spring being attached to the collar 8; As thus constructed, the mechanism shown and described operates as follows: In the set position of the levers b and d the arm of the lever g is held bearing against the back of the breast-beam, the effect of which is to bring the dagger-impact-receiving notch of said lever Q always in a definite position relatively to the dagger. Whenever failure of weft occurs, on the ensuing forward movement of the dagger with the batten its free end (preferably formed with a double bevel j) engages in the notch 9 of lever q and through the same and the spring 0 rocks the shaft 71, which, through its cam, in turn rocks the shaft 0 and so effects the tripping of lever b and the consequent stopping of the loom. The V-shape of the notch of lever g positively insures the dagger obtaining a purchase on the lever 9 that will cause a substantial turning thereof on its axis, whereas the spring 1*, made powerful enough to insure the levers rotary movement being effectually transmitted to the rock-shaft n, cushions the action of the dagger and so prevents injury to the parts. The tension of the spring 0" may be adjusted so that the spring will be under the desired degree of tension when the lever 12 is set (arm 9' of the lever then bearing against the breast-beam) by rotatively adjusting collar 8 on the rock-shaftn. i

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is:

l. The combination, with a fixed part of the loom, the rock-shaft journaled therein, power controlling mechanism controlled by the rock-shaft, the batten, the dagger movable in the batten and weft-controlled means for controlling the dagger, of means to transmit movement from the dagger to said rock-shaft including ,a dagger-impact-receiving member revoluble on said shaft and elastic means to cushion the rotary movement of said member on said shaft, substantially as described.

2. The combination, with a fixed part of the loom, the rock-shaft journaled therein, power controlling mechanism controlled by a the roclvshaft, the batten, the dagger movable in the batten and weft-controlled means for controlling the dagger, of means to transmit movement from the dagger to said rock-shaft includinga dagger-impact-receiving member having a dagger-impact-receiving notch disposed eccentrically of said shaft, said member being revoluble on said shaft, and elastic means to cushion the rotary movement of said member on said shaft, substantially as described.

3. The combination, with a fixed part of the loom, of the rock-shaft journaled therein, a lever fulcrumed on the rock-shaft and having an arm adapted to bear against said part of the loom and a dagger impact-receiving arm relatively opposite the first arm, a spring connecting said lever with and cushioning the movement thereof on said rock-shaft, the batten, the dagger movable in the batten and against the second arm of said lever, weft-controlled means for controlling the dagger, and setable power-com trolling mechanism controlled by the rockshaft and normally holding the same in the position where the first-named arm of said lever bears againstsaid fixed loom, substantially as described.

In testimony whereof Iaffix my signature in presence of two witnesses.

part of i the l/Vitnesses:

A. C; HUBER, WM. H. EVANS.

' Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G.

EMIL srAHL. y 

